THERMAL SCIENCE

International Scientific Journal

Thermal Science - Online First

Cheng Wang

,

Kaixiang Chang

,

Xiang Liu

,

Weixin Shi

,

Senhui Wang

online first only

Study on finite element method coupled with genetic algorithm in optimization for temperature uniformity of hot plate welding

ABSTRACT
Aiming to improve the temperature uniformity used for hot plate welding, two optimal design methods by coupling finite element method (FEM) with genetic algorithm (GA) are put forward and implemented into FEM software through the secondary development. Taking the positions of the heating holes and the heat fluxes applying to the heating holes as the optimization variables, the minimum temperature difference on the faying surface as the optimization objective, taking advantage of the numerical calculation of steady-state heat transfer, the parametric modeling of hot plate is carried out in accordance with the developed FEM-GA coupling optimization framework. The first optimal design method adopts a two-stage sequent optimization that the optimal positions of heating holes and the heat fluxes applying to the heating holes are sequentially obtained by using the two-step FEM-GA coupling calculations. The second optimal design method optimizes these variables simultaneously. The simultaneous optimal design method is further utilized to optimize the hot plate model associated with the orthogonal heating holes. In the case of the experience-based initialization of the optimization parameters, the two-stage sequent optimal design method is capable to achieve the better temperature uniformity on the faying surfaces with the lower computation costs, as compared with the results of the simultaneous optimal design method. The FEM-GA coupling optimal design method for improving the temperature uniformity used for hot plate welding would be of great significance for the industrial application of hot plate welding.
KEYWORDS
temperature uniformity, hot plate welding, genetic algorithm, finite element method
PAPER SUBMITTED: 2024-11-12
PAPER REVISED: 2024-11-25
PAPER ACCEPTED: 2024-12-01
PUBLISHED ONLINE: 2025-02-16
DOI REFERENCE: https://doi.org/10.2298/TSCI241112022W
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Study on finite element method coupled with genetic algorithm in optimization for temperature uniformity of hot plate welding